Stay-bolt structure



E.. I. DODDS.

STAY BOLT STRUCTURE.

APPLICATION FILED FEB. 16. 1921.

1,410,388, Patented Mar. 21, 1922.

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ETHAN I. nonns, or cnnrnar. VALLEY, new roan, essrertoa ro FLANNERY Born COMPANY, or PITTSBURGH, rnnlvsrrivnnrn.

SJTAY-BGLT STRUCTURE.

Application filed February 15, 1921.

To all 0.07am it may concern:

Be it known that I, l l'rirxir I. Donne, a cit-- izen of the United States, and'a resident oi? Central V alley, in the county of Orange and State of New York, have invented certain new and useful Improvements in Stay-Bolt Structures; and I do hereby declare the following to be a full, clear, and exact de scription of the invention, such as will en-- able others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in staybolt construction, the object being to provide improved means for universally mounting the stay bolt directly to the boiler sheet and it consists in the parts and combination of parts and in the details 01? construction as will be more fully explained and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in section of one embodiment of my invention; Figure 2 is a similar view taken at right angles to Figure 1 of a modified construction and Figure 3 is a plan view of the bridge and sphere, the bolt being; in section.

5 represents the outer sheet of a boiler having a bolt opening 6, the upper edge of the wall of said opening being concaved at 7 to form a seat for the two ends of the bridge 8. This seat 7 is continuous around the opening so that the bridge may turn or rotate on said seat around the long axis of the bolt, and the bridge is provided with widened ends as shown in Figures 2 and to prevent it from tipping, and with a concaved upper surface to receive the sphere 9 which is loosely mounted in said concavity and is free to roll in the latter.

The bolt 10 is enlarged and flattened at its outer end and is provided with an eye 11., the top or cross bar 12 of the bolt having a concave seat to engage the sphere 9 as,

clearly shown in Figure 1.

From the foregoing it will be seen that the bridge 8 is mounted directly on the outer sheet of the boiler and carries a sphere free to roll or move and that the cross bar 12 of the bolt spans the bridge and rests on the sphere, so that the bolt not only has a universal movement on the bridge, but also on the sphere.

12 is a sleeve welded at 13 to the sheet 5, and preferably overlapping the bolt open ing and ends of the bridge sufficiently to Specification of Letters Eatent.

Patented Mar. 21, 1922.

Serial No. 445,462.

limit the endwise sliding movement of the bridge, and ispreferably provided with an internally threaded portion to receive the cap 14-, and with an annular shoulder 15 against which the free edge of the cap rests to form a steam tight joint,

The bridge 8 is preferably widened at its ends and shaped to conform to the inner aces of the sides of the eye or link 11 so as to prevent undue rotary movement of the bridge independently of the bolt, ample space being left howeverbetween the bridge and sides of the eye or link 11 for the n0rmal movements of the bolt without inter: ference by the bridge-.. If however the more ment of the bolt shouldbe suflieient to engage the bridge the latter can turn on its bearing and thus prevent a binding action between the parts. The construction shown in Figure 2 is identical with that shown in F ure 1 except that the cover lei is integral and welded to the outer sheet and forms a permanent closure for the bolt opening.

In assen'ibling the parts the bridge is turn-- ed to screw the bolt to the inner sheet (not shown) in the well known manner and hence is initially adjusted with relation to the bolt, and after the bolt has been secured the sleeve is closed by the cap 14 or if the cup shaped cover plate 14-? be used the latter is th n welded in place.

lVith this construction the bolt is free to move in any direction to accommodate itself to the movements of the boiler sheets to which it may be secured without fulcruming; on the bridge or outer sheet and without producing any strains that would tend to fracture the bolt.

It is evident that many slight changes might be resorted to in the relative arrangement 01"? parts shown and described. without departing; from the spirit and scope of my invention hence I would have it understood that I do not wish to confine myself to the exact construction and arrangement of parts shown and described but,

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. In a staybolt structure, the combination of an outer sheet, a bridge supported at its ends directly on said sheet and provided with a concave upper face, a bolt provided with an eye through which the bridge passes, a sphere carried by the bridge and carrying of an outer-sheet having a bolt opening the bolt and a cap closing the bolt opening and covering the bolt and bridge. v

'2. In a staybolt structure, the combination of an outer sheet having a bolt opening therein the outer edge of the latter being curved, a curved bridge loosely mounted at its ends on said seat and a bolt having an eye through Which the bridge passes and asphere carried by the bridge and carrying the bolt.

3. In a staybolt structure, the combination of an outer sheet having a bolt. opening therein theouter edge of the wall of said opening being curved to form a seat, a curved bridge mounted at its ends on said seat and provided Witlra concave upper face, a sphere carried by the bridge and a bolt having an eye through which the bridge passes, the end or cross bar of said eye being supported on the sphere.

4; In a staybolt structure, the combination therein the outer edge of the Wall of said opening being curved to form a peripheral seat, a cover Welded to the outer sheet around the bolt opening and overhanging the latter,

a bridge mounted at its ends on said seat and provided with a concavity in its upper face, a sphere in said concavity and a bolt having an eye through Which the bridge passes, the end or cross bar of said eye being supported on the sphere. 5. In a staybolt structure, the combination of an outer sheet having a bolt opening, a bridge independent of the boltand supported at its ends directly on said sheet, a bolt having an eye through Which the bridge passes and a cover for the bolt opening and bolt.

6. In a stay bolt structure, the combination of an outer sheet having a bolt opening, a bridge independent of the bolt and supported at its ends directly on the Walls of,

said opening, a bolt having an eye through which the bridge passes and a cover for the bolt opening and bolt.

In testimony whereof, I have signed this specification in the presence of a subscribing Witness.

Witness EDWIN S. Bron.

n rnan I. DODDS. 

